Explainer
What is the water temperature after an electric kettle switches off?
An electric kettle switches off at or just below a rolling boil, so the water is essentially at boiling point the instant it clicks off, then begins cooling immediately; within a minute or two it has dropped a few degrees, which is why pouring promptly gives the hottest water.
By the Lush Editorial Team·Researched & Compared
When an electric kettle switches off, the water is essentially at boiling point, because the automatic shutoff is triggered by the steam of a rolling boil, so the kettle clicks off at or just below full boil. From that instant the water begins to cool, slowly at first, so within a minute or two it has dropped a little and continues to fall gradually as it stands. In practice this means the water is at its hottest the moment the kettle switches off, which is why pouring promptly gives you the hottest water for tea or coffee. The kettles in our best gooseneck kettles guide, unless set to a lower temperature, all shut off at boiling.
It shuts off at boiling
A standard electric kettle without temperature settings boils the water fully and then switches off. The shutoff works by detecting the steam produced once the water reaches a rolling boil, which flexes a sensor that releases the switch, so the click off happens right at, or a moment after, boiling point. This means that at the instant the kettle switches off, the water is as hot as it is going to get, essentially at the boiling point of water for your altitude. There is no overshoot beyond boiling, since water cannot get hotter than its boiling point in an open kettle; it simply turns to steam, which is what triggers the shutoff.
It starts cooling immediately
The moment the kettle switches off and stops heating, the water begins to lose heat to the cooler kettle body and the surrounding air. The cooling is gradual, fastest at first when the water is hottest and the difference from the room is greatest, then slowing as it approaches room temperature. So a few seconds after the click the water is still essentially boiling, within a minute it has dropped only slightly, and over several minutes it falls more noticeably. This is ordinary cooling, and it is why, if you want water at the boil, you pour it straight away rather than letting it stand.
Boiling point and altitude
The exact temperature at which the water boils, and so the temperature at shutoff, depends on altitude. At sea level water boils at its standard boiling point, but at higher altitudes, where air pressure is lower, water boils at a lower temperature, so a kettle at altitude switches off at a cooler point than one at sea level, because the water reaches a rolling boil sooner and cooler. For everyday purposes this rarely matters, but it is why the shutoff temperature is not a single fixed number everywhere; it is whatever boiling point your location gives, which the steam sensor responds to.
Why it matters for tea and coffee
The water temperature after shutoff matters because different drinks want different temperatures. Black tea and many coffees are brewed with water at or near boiling, so pouring straight after the kettle clicks off is ideal. Green and white teas, and some coffee methods, prefer water a little below boiling, so you either let the just boiled water stand a short while to cool a few degrees, or use a kettle with variable temperature control that stops below boiling. Knowing that the water is at boiling when the kettle switches off, and cools from there, lets you judge when to pour for the drink you are making.
Variable temperature kettles
Kettles with temperature control change the answer, because they do not necessarily boil. On a variable temperature kettle you can select a target below boiling, and the kettle switches off when the water reaches that chosen temperature rather than waiting for a full boil, so the water after shutoff is at whatever temperature you set. These are useful precisely because they deliver below boiling water for teas and coffees that want it, without you having to boil and then wait for the water to cool. On a plain kettle, though, shutoff always means boiling point, and cooling from there is up to you.
The short answer
So after a standard electric kettle switches off, the water is essentially at boiling point, because the shutoff is triggered by the steam of a rolling boil, and it immediately begins to cool, dropping only slightly in the first minute and more over several minutes as it stands. The exact boiling temperature depends on your altitude. For the hottest water, pour straight away; for drinks that want cooler water, let it stand a little or use a variable temperature kettle that stops below boiling. In short, shutoff means boiling, and the water cools from there.
Common questions
What temperature is the water when an electric kettle turns off?
Essentially boiling point. A standard kettle's automatic shutoff is triggered by the steam of a rolling boil, so it clicks off at or just below full boil, meaning the water is as hot as it will get at that instant. From there it begins cooling immediately. The exact boiling temperature depends on your altitude, since water boils cooler at higher elevations where the air pressure is lower.
Does kettle water stay at boiling after it switches off?
No, it starts cooling the moment the kettle stops heating, losing heat to the kettle body and the air. The cooling is gradual, fastest at first, so a few seconds after the click the water is still essentially boiling, within a minute it has dropped only slightly, and over several minutes it falls more. For the hottest water you pour straight away rather than letting it stand.
How quickly does kettle water cool after boiling?
Gradually, and fastest at first. In the first few seconds it is still essentially boiling, after about a minute it has dropped only a little, and over several minutes it cools more noticeably as it approaches room temperature. The rate depends on the room, the kettle, and how much water there is, with a small amount cooling faster. For near boiling water, pour within the first minute or so after it switches off.
Why does my kettle switch off before the water looks fully boiling?
Because the shutoff responds to the steam a rolling boil produces, which can trigger the sensor at or just before the water reaches a vigorous, visible boil, so it clicks off right around boiling point. The water is essentially at boiling temperature even if the bubbling looks like it has only just started. The lid must be closed for the steam to reach the sensor and switch the kettle off properly.
Can a kettle heat water hotter than boiling?
Not in an open kettle. Water cannot get hotter than its boiling point in a normal kettle, because once it reaches that temperature it turns to steam rather than getting hotter, and that steam is what triggers the shutoff. So the water after the kettle switches off is at boiling point, not above it. A variable temperature kettle can instead stop below boiling at a temperature you choose, for teas and coffees that want cooler water.